You have noticed that you do not get the loft you desire but it is not due to hand position or changing the loft of the clubface.
You have a slow swing speed due to poor hip positioning and swing path.
You want to get a little more clubhead speed at the bottom of your swing.
You want to get the most distance out of your tee shots or you find that you are losing power.
You plan on trying to add a little more power to your drives.
You want to gain a few extra yards off of your tee shots.
You want to gain more distance from your drives.
You need to work on gaining more distance off of the tee box.
You want a more ball compression and power in your swing.
You need a longer drive than usual.